Attention all water providers: the EPA’s UCMR 5 list includes 30 contaminants (29 PFAS and lithium) that both small and large water systems must test for and report starting 2023.

What water providers need to know.

  • The fifth and latest list (UCMR 5)was published on March 11, 2021, and includes 30 new chemical contaminants that must be monitored between 2023 and 2025 using specified analytical methods.
  • Safe Drinking Water Act now requires that UCMR include all large PWSs (serving >10,000 people), all PWSs serving between 3,300 and 10,000 people, and a representative sample of PWSs serving fewer than 3,300 people.
  • Large systems must pay for their own testing, and US EPA will pay for analytical costs for small systems.
  • Labs must receive EPA UCMR approval to conduct analyses on UCMR 5 contaminants.

AEL was certified to provide analytical services for the upcoming sampling period (2023-2025). No matter what size Public Water Drinking System AEL can help you maintain compliance. AEL is a UCMR Approved Lab.